/*************************************************************************/
/*  scroll_bar.h                                                         */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#ifndef SCROLL_BAR_H
#define SCROLL_BAR_H

#include "scene/gui/range.h"


/**
	@author Juan Linietsky <reduzio@gmail.com>
*/
class ScrollBar : public Range {
	
	OBJ_TYPE( ScrollBar, Range );
	
	enum HiliteStatus {
		HILITE_NONE,
		HILITE_DECR,
		HILITE_RANGE,
		HILITE_INCR,		
	};
	
	static bool focus_by_default;
	
	Orientation orientation;
	Size2 size;
	float custom_step;
	
	HiliteStatus hilite;
	
	struct Drag {
		
		bool active;
		float pos_at_click;
		float value_at_click;
	} drag;
	
	
	double get_grabber_size() const;
	double get_grabber_min_size() const;
	double get_area_size() const;
	double get_area_offset() const;
	double get_click_pos(const Point2& p_pos) const;
	double get_grabber_offset() const;
	
	static void set_can_focus_by_default(bool p_can_focus); 
	
	
	void _input_event(InputEvent p_event);
protected:	
	void _notification(int p_what);

	static void _bind_methods();		

public:

	void set_custom_step(float p_custom_step);
	float get_custom_step() const;

	virtual Size2 get_minimum_size() const;	 	
	ScrollBar(Orientation p_orientation=VERTICAL);	
	~ScrollBar();

};

class HScrollBar : public ScrollBar {
	
	OBJ_TYPE( HScrollBar, ScrollBar );
public:
	
	HScrollBar() : ScrollBar(HORIZONTAL) { 	set_v_size_flags(0); }
};

class VScrollBar : public ScrollBar {
	
	OBJ_TYPE( VScrollBar, ScrollBar );
public:
	
	VScrollBar() : ScrollBar(VERTICAL) { set_h_size_flags(0); }
};


#endif
